DE102015011075A1 - Water level detector with district heating system - Google Patents

Water level detector with district heating system Download PDF

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Publication number
DE102015011075A1
DE102015011075A1 DE102015011075.6A DE102015011075A DE102015011075A1 DE 102015011075 A1 DE102015011075 A1 DE 102015011075A1 DE 102015011075 A DE102015011075 A DE 102015011075A DE 102015011075 A1 DE102015011075 A1 DE 102015011075A1
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DE
Germany
Prior art keywords
sleeve
hollow rod
water level
level detector
heating system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE102015011075.6A
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German (de)
Inventor
Peter Knuth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BRANDES GmbH
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BRANDES GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BRANDES GmbH filed Critical BRANDES GmbH
Priority to DE102015011075.6A priority Critical patent/DE102015011075A1/en
Priority to EP16184597.9A priority patent/EP3136064A1/en
Publication of DE102015011075A1 publication Critical patent/DE102015011075A1/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/246—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices
    • G01F23/247—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices for discrete levels
    • G01F23/248—Constructional details; Mounting of probes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
    • G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

Wasserstandsmelder zum Erkennen des Eintritts von Wasser in einen Schacht eines Fernwärmesystems, mit einer unten offenen Hülse (10) aus einem elektrisch leitfähigen Material, einem von der Hülse (10) umgebenen, über dessen offene untere Stirnseite hinaus ragenden, unten verschlossenen Hohlstab (12) aus einem elektrisch leitfähigen Material und einer von der Hülse (10) aufgenommenen, den elektrischen Widerstand zwischen Hülse (10) und Hohlstab (12) messenden Sensorik, mit einem in dem Hohlstab (12) gelagerten, bis an das untere Ende des Hohlstabs (12) geführten Temperaturfühler (16). Wasserstandsmelder nach Anspruch 1, dadurch gekennzeichnet, dass der Temperaturfühler (16) mittels einer wärmeleitfähigen Masse in dem Hohlstab (12) eingebettet ist.Water level detector for detecting the entry of water into a shaft of a district heating system, with a downwardly open sleeve (10) of an electrically conductive material, one of the sleeve (10) surrounded, beyond its open lower end face protruding, bottom closed hollow rod (12) of an electrically conductive material and of the sleeve (10) recorded, the electrical resistance between sleeve (10) and hollow rod (12) measuring sensor, with a in the hollow rod (12) mounted, to the lower end of the hollow rod (12 ) guided temperature sensor (16). Water level detector according to claim 1, characterized in that the temperature sensor (16) by means of a thermally conductive mass in the hollow rod (12) is embedded.

Description

Die Erfindung betrifft einen Wasserstandsmelder zum Erkennen des Eintritts von Wasser in einen Schacht eines Fernwärmesystems, mit einer unten offenen Hülse aus einem elektrisch leitfähigen Material, einem von der Hülse umgebenen, über dessen offene untere Stirnseite hinaus ragenden, unten verschlossenen Hohlstab aus einem elektrisch leitfähigen Material und einer von der Hülse aufgenommenen, den elektrischen Widerstand zwischen Hülse und Hohlstab messenden Sensorik.The invention relates to a water level detector for detecting the entry of water into a shaft of a district heating system, with a bottom open sleeve made of an electrically conductive material, surrounded by the sleeve, beyond the open lower end side protruding, bottom closed hollow rod made of an electrically conductive material and one of the sleeve received, the electrical resistance between the sleeve and hollow rod measuring sensor.

Bei Fernwärmesystemen werden erforderliche Stellelemente regelmäßig in einem Schacht angeordnet, der den Zugang zu den Stellelementen ermöglicht. Dabei werden Wasserstandsmelder vorgesehen, die zum Erkennen des Eintritts von Wasser in den Schacht erlauben, wobei der Wasserstandsmelder an der Wandung des Schachts angeordnet ist.In district heating systems required control elements are regularly arranged in a shaft, which allows access to the control elements. In this case, water level sensors are provided which allow for detecting the entry of water into the shaft, wherein the water level detector is arranged on the wall of the shaft.

Es ist nun erwünscht, nicht nur das Vorhandensein von in dem Schacht aufsteigendem Wasser zu erkennen, sondern auch zwischen in dem Schacht eindringenden Grund- oder Regenwasser einerseits und aus einer Leckstelle des Fernwärmesystems ausgetretenem Wasser andererseits zu differenzieren.It is now desired not only to detect the presence of rising water in the shaft, but also to differentiate between groundwater or rainwater entering the shaft on the one hand and leaked water from a leak of the district heating system on the other hand.

Erfindungsgemäß wird diese Aufgabe gelöst durch einen in dem Hohlstab gelagerten, bis an das untere Ende des Hohlstabs geführten Temperaturfühler.According to the invention this object is achieved by a mounted in the hollow rod, guided to the lower end of the hollow rod temperature sensor.

Der Temperaturfühler ist vorzugsweise mittels einer wärmeleitfähigen Masse in dem Hohlstab eingebettet.The temperature sensor is preferably embedded in the hollow rod by means of a thermally conductive mass.

Die Erfindung wird im Folgenden anhand einer einzigen Zeichnung erläutert, die einen derartigen Wasserstandsmelder in einer Schnittdarstellung direkt wiedergibt.The invention will be explained below with reference to a single drawing, which directly reproduces such a water level detector in a sectional view.

Der Wasserstandsmelder besteht aus einer Hülse 10 aus einem elektrisch leitfähigen Material, die – bei Montage – unten offen ist. Die Hülse 10 nimmt eine Sensorik 14 auf, deren Messwerte über ein Kabel 18 nach außen geführt werden. Der Wasserstandsmelder weist einen Hohlstab 12 auf, der aus einem elektrisch leitfähigen Material besteht. Der Hohlstab 12 ragt über die untere offene Stirnseite der Hülse 10 hinaus, er ist unten verschlossen.The water level detector consists of a sleeve 10 made of an electrically conductive material which - when installed - is open at the bottom. The sleeve 10 takes a sensor 14 on whose readings via a cable 18 be led to the outside. The water level detector has a hollow bar 12 on, which consists of an electrically conductive material. The hollow bar 12 protrudes over the lower open end of the sleeve 10 out, he is locked down.

Die Sensorik ist einerseits mit der Hülse 10, andererseits mit der Wandung des Hohlstabs 12 verbunden und misst den elektrischen Widerstand zwischen Hülse 10 und Hohlstab 12, der in dem Moment schlagartig abnimmt, in dem das Wasser die untere Stirnseite der Hülse 10 erreicht.The sensor is on the one hand with the sleeve 10 on the other hand with the wall of the hollow bar 12 connected and measures the electrical resistance between sleeve 10 and hollow bar 12 which abruptly decreases in the moment in which the water is the lower end face of the sleeve 10 reached.

In dem Hohlstab 12 ist ein Temperaturfühler 16 gelagert, der bis in die Nähe des unteren Endes des Hohlstabs 12 geführt ist. Der Temperaturfühler 16 ist vorzugsweise mittels einer wärmeleitfähigen Masse in dem Hohlstab 12 eingebettet.In the hollow bar 12 is a temperature sensor 16 stored, which is close to the lower end of the hollow rod 12 is guided. The temperature sensor 16 is preferably by means of a thermally conductive mass in the hollow rod 12 embedded.

Der Messfühler 16 wird von einer Elektronik gespeist und abgefragt.The sensor 16 is powered by electronics and queried.

Es ist weiter erkennbar, dass der Hohlstab 12 in seinem oberen freiliegenden Bereich von einem Schrumpfschlauch 20 umgeben wird, durch den dessen Isolation sichergestellt ist.It is further apparent that the hollow bar 12 in its upper exposed area of a shrink tube 20 surrounded by its isolation is ensured.

Claims (2)

Wasserstandsmelder zum Erkennen des Eintritts von Wasser in einen Schacht eines Fernwärmesystems, mit einer unten offenen Hülse (10) aus einem elektrisch leitfähigen Material, einem von der Hülse (10) umgebenen, über dessen offene untere Stirnseite hinaus ragenden, unten verschlossenen Hohlstab (12) aus einem elektrisch leitfähigen Material und einer von der Hülse (10) aufgenommenen, den elektrischen Widerstand zwischen Hülse (10) und Hohlstab (12) messenden Sensorik, gekennzeichnet durch einen in dem Hohlstab (12) gelagerten, bis an das untere Ende des Hohlstabs (12) geführten Temperaturfühler (16).Water level sensor for detecting the entry of water into a shaft of a district heating system, with a bottom open sleeve ( 10 ) of an electrically conductive material, one of the sleeve ( 10 ), projecting beyond its open lower end face, hollow rod closed at the bottom ( 12 ) of an electrically conductive material and one of the sleeve ( 10 ), the electrical resistance between sleeve ( 10 ) and hollow bar ( 12 ) measuring sensors, characterized by a in the hollow bar ( 12 ) up to the lower end of the hollow rod ( 12 ) guided temperature sensor ( 16 ). Wasserstandsmelder nach Anspruch 1, dadurch gekennzeichnet, dass der Temperaturfühler (16) mittels einer wärmeleitfähigen Masse in dem Hohlstab (12) eingebettet ist.Water level detector according to claim 1, characterized in that the temperature sensor ( 16 ) by means of a thermally conductive mass in the hollow rod ( 12 ) is embedded.
DE102015011075.6A 2015-08-24 2015-08-24 Water level detector with district heating system Pending DE102015011075A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102015011075.6A DE102015011075A1 (en) 2015-08-24 2015-08-24 Water level detector with district heating system
EP16184597.9A EP3136064A1 (en) 2015-08-24 2016-08-17 Water level detector in a district heating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015011075.6A DE102015011075A1 (en) 2015-08-24 2015-08-24 Water level detector with district heating system

Publications (1)

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DE102015011075A1 true DE102015011075A1 (en) 2017-03-02

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Country Status (2)

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EP (1) EP3136064A1 (en)
DE (1) DE102015011075A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111366212A (en) * 2020-05-09 2020-07-03 河北省地质环境监测院 Unattended underground water level detector
CN112611640A (en) * 2020-10-22 2021-04-06 西南石油大学 Device and method for testing high-temperature compression performance of variable-specification multi-size rubber cylinder
DE102020116651A1 (en) 2020-06-24 2021-12-30 ACO Severin Ahlmann GmbH & Co Kommanditgesellschaft Building protection system and procedures

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108335459A (en) * 2018-01-18 2018-07-27 毛杰 A kind of water conservancy flood situation automatic on-line monitoring alarm

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4116355A1 (en) * 1991-05-18 1992-11-19 Oplaender Wilo Werk Gmbh Temp. measurement sensor for electrically conducting fluid, e.g. water - has additional level sensor with two electrodes, one of which can be rod-shaped temp. sensor
DE20121367U1 (en) * 2001-02-06 2002-08-08 Hew Ag Device for monitoring the water level in a shaft, in particular in a shaft of a district heating network
DE102012109308A1 (en) * 2012-10-01 2014-04-03 Endress + Hauser Flowtec Ag Level monitoring system and flowmeter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
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US5178009A (en) * 1990-03-08 1993-01-12 Industrial Engineering And Equipment Company Integral temperature and liquid level sensor and control
US5111691A (en) * 1990-12-20 1992-05-12 Itt Corporation Conductance/thermal limit control apparatus and method
GB2266956B (en) * 1992-05-13 1995-10-25 Spirax Sarco Ltd Sensor Unit
US7891572B1 (en) * 2007-04-05 2011-02-22 C. Cowles & Company Temperature and low water monitoring for boiler systems
US7836761B2 (en) * 2008-02-07 2010-11-23 Robert Brian Tonner Immersion thermowell for temperature and water level sensing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4116355A1 (en) * 1991-05-18 1992-11-19 Oplaender Wilo Werk Gmbh Temp. measurement sensor for electrically conducting fluid, e.g. water - has additional level sensor with two electrodes, one of which can be rod-shaped temp. sensor
DE20121367U1 (en) * 2001-02-06 2002-08-08 Hew Ag Device for monitoring the water level in a shaft, in particular in a shaft of a district heating network
DE102012109308A1 (en) * 2012-10-01 2014-04-03 Endress + Hauser Flowtec Ag Level monitoring system and flowmeter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111366212A (en) * 2020-05-09 2020-07-03 河北省地质环境监测院 Unattended underground water level detector
CN111366212B (en) * 2020-05-09 2021-09-07 河北省地质环境监测院 Unattended underground water level detector
DE102020116651A1 (en) 2020-06-24 2021-12-30 ACO Severin Ahlmann GmbH & Co Kommanditgesellschaft Building protection system and procedures
DE102020116651B4 (en) 2020-06-24 2023-06-01 Aco Ahlmann Se & Co. Kg Building protection system and procedures
CN112611640A (en) * 2020-10-22 2021-04-06 西南石油大学 Device and method for testing high-temperature compression performance of variable-specification multi-size rubber cylinder
CN112611640B (en) * 2020-10-22 2022-05-17 西南石油大学 Device and method for testing high-temperature compression performance of variable-specification multi-size rubber cylinder

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Representative=s name: LOBEMEIER, MARTIN LANDOLF, DR., DE